Eredivise is obviously weaker than Ligue 1 and probably the portuguese league. The weaker the league is, the smaller will be the pool for one of the best leagues. There are still more hits from Eredivise though.
Eriksen, Vertonghen, Alderweireld, Suarez, Wijnaldum, Vermaelen, Dembele. Blind wasn't bad by any means for us either and could have been useful if not for Jose and his focus on physicality.
For players doing well at midtable clubs you also have the likes of Vorm, Tiote, Tadic, Pelle, Bony etc..
At the end of the day like with other leagues there will be hits and flops. If we wait till he succeeds at Bayern, he will be most likely off the market for us or will cost insane money. If Ten Hag is confident he should join us, I wouldn't say no to him. Not everyone of that Ajax side will be brilliant and succeed at a top club, but like always you will have 1-3 players who will. From that first Ajax side it definitely was players like De Jong or De Ligt, who are starters at big clubs. For Jardim's Monaco you had flops like Bakayoko or Lemar, but also hits like Mbappe, Bernardo Silva or Fabinho for example.
Based from what I saw from him so far I think he is the most likely one too succeed alongside Gravenberch, who has lots of potential imo (seems Bayern-bound too). Just feel that his abilities and qualites can translate to other leagues well and he looked really good in Europe too.